Motorcycle undertail exhaust



FIG. 1 is a rear elevational view of an embodiment of the motorcycle undertail exhaust.

FIG. 2 is a rear perspective view of the motorcycle undertail exhaust; and,

FIG. 3 is a bottom plan view of the motorcycle undertail exhaust.

The broken lines shown in FIGS. 1-3 are included for the purpose of illustrating environmental elements only and form no part of the claimed design. 

The ornamental design for a motorcycle undertail exhaust, as shown and described. 